Malicious PDF — malware analysis report

Static analysis result for SHA-256 fafa9b8eca786410…

MALICIOUS

PDF

54.6 KB Created: 2021-09-20 13:04:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7bbfba820902139167d4d7792be9a9a0 SHA-1: 44c7516dc3c38862b01be6c41112de7659c245a5 SHA-256: fafa9b8eca786410e13c18f341af8cab1a47aa331ed89f7b4143a74761032f55
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised or disposable, suggesting an attempt to obscure the ultimate destination. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely involving phishing or the delivery of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5388

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16134c479cdf59---97373889521.pdf In PDF document text
    • https://northcoteplaza.com/userfiles/file/sujubatolepejimejixos.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/musizatekorasut.pdfIn PDF document text
    • http://www.satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/jerixarifafe.pdfIn PDF document text
    • http://directartdeal.com/uploaded_files/userfiles/files/93649310554.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/94423946040.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/47834691787.pdfIn PDF document text
    • https://www.ijmsir.com/ckfinder/userfiles/files/didekowujowepu.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/0cd64aae9bcbd14a912024d43d2cfd2f/19822387252.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/46441751325.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/genewatafalu.pdfIn PDF document text
    • http://law885995.com/upload/fckimages/file/11524577268.pdfIn PDF document text
    • https://foodexgida.com/uploads/files/wenosivevurinilen.pdfIn PDF document text
    • https://haruhonpo.com/upload/haruhonpo/files/muxutajurarasap.pdfIn PDF document text
    • http://tnetimes.kr/upload/file///6775364431.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/34595367815.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files/25565459294.pdfIn PDF document text
    • http://tongkhomica.com/upload/files/58700626758.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/a54352bbd00b3db9c7688eced63e910f/bimisuxakiruripimabobi.pdfIn PDF document text
    • https://ost-fogging.com/upload/files/gopobubudul.pdfIn PDF document text
    • http://targhevaticane.it/userfiles/files/87480649122.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/4qhent5fo9n132e7138m1qji56/jodofubugidabudadijejofoz.pdfIn PDF document text
    • http://artattack-concerts.de/files/file/totavuv.pdfIn PDF document text
    • https://a-pointpro.com/cms/ckfinder/userfiles/files/wuligekaluxesilirumu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=custom+rom+installerPDF link annotation

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